A rectangular sticker has an area of 156 cm². Its length is 13 cm. What is its breadth?

A rectangular sticker has an area of $156 cm^{2}$ . Its length is 13 cm. What is its breadth?

Class 6MensurationMensuration

Area =

l \times b

, so

b = 156 \div 13 = 12

cm. Check:

13 \times 12 = 156

. 143 cm comes from 156 − 13 and 78 cm from 156 ÷ 2 — but an area is a product, so it is undone by dividing by the side you already know.

Answer: A) 12 cm

Area measures how much flat space a shape covers. The unit is a **square** of side 1 — so

cm^{2}

(square centimetres),

m^{2}

(square metres), etc. To measure the area of a rectangle visually, imagine covering it with 1-cm squares: count them. A rectangle 5 cm by 3 cm holds

5 \times 3 = 15

little squares, so its area is

15 cm^{2}

. The general formula is the same idea: area of rectangle =

l \times b

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